White, who headlined this year's edition of Lolla Argentina, has previously covered "The Lemon Song" -- from the classic rock group's 1969 album, Led Zeppelin II -- on recent live dates. Watch Plant lend his awesome vocals while White riffs on guitar in the video below.

"I love Jack White's buccaneer spirit, and the way he dodges through the musical horizons. I'd be happy to make a single with him," Plant said in a Reddit interview last September (via Rolling Stone).

Plant was also performer at Lolla Argentina 2015. Other artists on the bill include Pharrell Williams, Calvin Harris, and Skrillex. The festival, held at Hippodromo de San Isidro in Buenos Aires, concludes on Sunday (March 22).